中学时代是长知识、长身体和增强体质的最重要、最有利的时期。良好的营养、适当的锻炼和合理的作息是影响其身心发育的三个重要因素。青春期体格发育极为迅猛,各个器官都在增大,脑、心、肝、肾等功能增强,加上学习紧张、活动量大,也需要更多的热量和营养素。而根据全国营 High school is a long period of knowledge, physical growth and enhance the most important and most beneficial period. Good nutrition, proper exercise and reasonable rest are three important factors affecting their physical and mental development. Physical development in adolescence is extremely rapid, all organs are increasing, brain, heart, liver, kidney and other functions enhanced, coupled with learning stress, activity, also need more calories and nutrients. According to the national camp